No S24LE3 output on Pi4

[Freijnen]

Strange problem;
I have the following setup:
Raspberry Pi4 2 gb met MoOde 8.3.9
SoundBlaster Live! 24 bit external
CamillaDSP active to output sound on 6 channels

This works fine with output set to S16LE
But MPD gives a 'failed to open output' error when i try to set output to S24LE3
If i look in the CamillaDSP log i see the following error:

Playback error: ALSA function 'snd_pcm_hw_params' failed with error 'ENOSPC: No space left on device'

This setup does work on a Pi3 (using the same SB USB audio device)

Any idea's?